S. I. Smith — Crustaceans of the Atlantic Coast. 73 
The preceding table gives measurements * and the dental formula 
for the rostrum of some of the specimens from different localities. 
Hippolyte Phippsii Kroyer. 
Hippolyte Phippsii Kroyer, Naturhistorisk Tidsskrift, iii, p. 575, 1841 ( $). 
Hippolyte turgida Kroyer, loc. cit., p. 575, 1841 (2). 
Hippolyte vibrans Stimpson, Annals Lyceum Nat. Hist. New York, x, p. 125, 1871 
( $ , var.) 
? Hippolyte Ochotensis Brandt, in Middendorff’s Sibirische Reise, ii, p. 120, pi. 5, fig. 
17, 1849 ( 2 ). 
Massachusetts Bay!, off Salem, 1877: 20 fathoms, rocks and 
gravel ; 33 fathoms, sand and mud ; 35 fathoms, mud and clay 
nodules ; and 48 fathoms, soft mud. Off Cape Ann !, 50 fathoms, 
mud and gravel, 1877. Off the Isles of Shoals!, 27 to 36 fathoms, 
rocks and mud, 1874. Jeiirey’s Ledge!, 24 fathoms, gravel and 
stones, 1873. Cashe’s Ledge!, 27 and 40 fathoms, 1874, — 27 males 
and 24 females. Near Cashe’s Ledge!, 52 to 90 fathoms, rocky, 
1873. Casco Bay!, 10 to 22 fathoms, rocky, near West Cod Ledge, 
1873. Eastport !, Bay of Fundy, 18-25 fathoms, rocks and shells, 
1868, 1870. Grand Menan !, Bay of Fundy, 1872 (Prof. H. E. 
Webster). Halifax!, Nova Scotia, 1877: 16 fathoms, fine sand and 
red algae; 18 fathoms, fine sand; 25 fathoms, rocks and nullipora ; 
25 fathoms, gravel; and 26 to 41 fathoms, soft mud, in Bedford 
Basin, — a single specimen. Gulf of St. Lawrence ! (J. F. Whiteaves): 
off Trinity Bay, 90 fathoms, small stones and coarse sand, and off 
Cape Rosier Light, 125 fathoms, mud, 1871; Orphan Bank, 1873. 
Labrador! (A. S. Packard, Jr.) Grinnell Land and as far north as 
latitude 81° 44' (Miers). Greenland (Kroyer, Stimpson, et al.). Arctic 
* In these measurements, as in all those which I give of Macrura and Schizopoda, 
the length is from the tip of the rostrum to the tip of the telson while the abdomen is 
extended nearly straight with the carapax ; the length of the carapax and rostrum is 
from the tip of the rostrum to the middle of the posterior margin ; the length of the 
rostrum is from the tip to the posterior margin of the orbit ; the breadth of the cara- 
pa.r is at the widest point — a measurement which varies with the state of contraction 
more than the others. The length of the rostrum as measured above may be very 
slightly too great, particularly if the rostrum be relatively short, since it is not per- 
fectly parallel with the longitudinal axis, but it has the practical advantage of being 
between definite points — a matter of the utmost importance. The length of the cara- 
pax exclusive of the rostrum is taken from the posterior margin of the orbit to the 
middle of the posterior margin, but is found accurately enough by subtracting the 
length of the rostrum from that of the carapax and rostrum. If the rostrum is very 
short it is better to measure the length of the carapax exclusive of the rostrum and 
find the length of the rostrum by subtraction. 
Trans. Conn. Acad., Vou V. 10 January, 1879. 
